Absorbent material

Robert Cheeseman Christopher (Inventor), Mark Tyrer (Inventor), Whincup Greaves Rosemary Irene (Inventor), Anthony Lupo Richard (Inventor), Savi Madan (Inventor)

Research output: Patent


An absorbent composition is manufactured and used in cat litter. The composition includes: a particulate inorganic mineral, one or more superabsorbent polymers (SAP) dispersed between the particles of the mineral, and a hydrophilic binder capable of binding the mineral and the SAP into discrete granules. The granular material produced has water absorbency characteristics comparable to that of more expensive bentonite-products. The mineral may be waste quarry fines that would otherwise have to be disposed of. Such fines are widely available, in contrast to bentonite that must be shipped from a restricted number of locations, which is environmentally damaging and associated with excessive product miles. The granules can be made by mixing the mineral and the super absorbent polymer to form a slurry, draining the water from the slurry and optionally pressing the resulting filter cake, mixing the binder with the wet filter cake and granulating the resulting composition.

Original languageEnglish
Patent numberUS2012118242
IPCA01K 29/00 A I
Priority date19/04/10
Publication statusPublished - 17 May 2012

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  • Cite this

    Cheeseman Christopher, R., Tyrer, M., Greaves Rosemary Irene, W., Lupo Richard, A., & Madan, S. (2012). IPC No. A01K 29/00 A I. Absorbent material. (Patent No. US2012118242).